DUNCAN PUBLIC UTILITIES AUTH
NPDES ID: OK0026638
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 effluent violation, 4 permit schedule violations, 81 reporting violations.
Violations
June 30, 2026
E. coli
96% over limit
Discharged 797 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2026
Cyanide, total [as CN]
0% over limit
Discharged 0.006 mg/L against a permitted limit of 0.01761 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.2 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.77179999 kg/d against a permitted limit of 17.02499986 kg/d (MO AVG)
DMR, Limited - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0001 mg/L (DAILY MX)
DMR, Limited - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)